Answer:
10
Step-by-step explanation:
[tex] {14}^{2} = ( {9}^{2} + {x}^{2} )[/tex]
[tex]196 = 81 + {x}^{2} [/tex]
[tex]196 - 81 = {x}^{2} [/tex]
[tex]115 = {x}^{2} [/tex]
[tex]x = \sqrt{115} [/tex]
X = 10.7
